Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..
Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..
Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..
In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..
Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..
